OLYCRAFT 5PCS Polypropylene Microcentrifuge Tube Rack, Double Panel 60-Well Centrifuge Test Tube Holder for Chemistry Laboratory - Assorted Colors

These have held up well in cold and hot conditions. They been disinfected with ethanol, isopropanol and dilute bleach and show no signs of warping or discoloration or wear. They fit 1.5 tubes easily. The price point compared to Sigma or Fisher is exceptional - definitely get these instead! I do R&D for my job and these are perfect to use and work great.

These are solid and a really great design. Wish there was a red one to finish the rainbow!

These are a good deal for what you are getting (flippable tube rack), but the 1.5mL tubes are a little loose and stand a little high. If you want your tubes to fit snugly, this is not the rack for you.

Confiables y de excelente calidad

good for both 0.5 and 2.0 ml microcentrifuge vials, strongly recommended

Received the product as described

PhD student here. These tube holders were nice quality, felt as good as the other ones we have in the lab. There are two sides that are useable, one for the regular 1.5mL Eppendorf tubes and the other for smaller tubes. I though that these were ok, offered more spacing between tubes so the tubes won't collide with each other. Unfortunately the height of each well is a bit low which made the regular 1.5mL tubes seem a little bit more unstable. Overall, good price for a lot of tube racks. Not sure if these are autoclave-able though. I wouldn't risk it.

These work great but I do find them a tad too shallow. They'd be perfect if only they were a bit deeper.